term:

Uti Possidetis

uti possidetis n

[Late Latin, as you (now) possess (it); from the wording of an interdict in Roman law enjoining both parties in a suit to maintain the status quo until the decision]
: a principle in international law that recognizes a peace treaty between parties as vesting each with the territory and property under its control unless otherwise stipulated

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.